So far, various works [1]}, [2]} have shown that \(\mathcal {NC}\)\(_1\)  metric converges to zero when evaluated on the last-layer feature
\(\mathbf {h} = \sigma { \mathbf {W}_{L-1} \cdots \sigma {\mathbf {W}_1 \mathbf {x} + \mathbf {b}_1} + \mathbf {b}_{L-1} }.\) 
